California Probate Code
A trust company may be appointed to act as a personal representative, guardian or conservator of an estate, or trustee, in the same manner as an individual. A trust company may not be appointed guardian or conservator of the person of a ward or conservatee.
(a) A trust company appointed to act as a personal representative, or guardian or conservator of an estate, may not be required to give a bond.
(b) The liability of a trust company and the manner of its making of oaths and affidavits are governed by Article 3 (commencing with Section 1540) of Chapter 12 of Division 1 of, and Section 1587 of, the Financial Code.